similar to: [PATCH 4.14 02/92] x86/asm: Add _ASM_ARG* constants for argument registers to <asm/asm.h>

4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: H. Peter Anvin <hpa at linux.intel.com> commit 0e2e160033283e20f688d8bad5b89460cc5bfcc4 upstream. i386 and x86-64 uses different registers for arguments; make them available so we don't have to #ifdef in the actual code. Native size and specified size (q, l, w, b) versions are

4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: H. Peter Anvin <hpa at linux.intel.com> commit 0e2e160033283e20f688d8bad5b89460cc5bfcc4 upstream. i386 and x86-64 uses different registers for arguments; make them available so we don't have to #ifdef in the actual code. Native size and specified size (q, l, w, b) versions are

4.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: H. Peter Anvin <hpa at linux.intel.com> commit 0e2e160033283e20f688d8bad5b89460cc5bfcc4 upstream. i386 and x86-64 uses different registers for arguments; make them available so we don't have to #ifdef in the actual code. Native size and specified size (q, l, w, b) versions are

This is a note to let you know that I've just added the patch titled x86/asm: Add _ASM_ARG* constants for argument registers to <asm/asm.h> to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: x86-asm-add-_asm_arg-constants-for-argument-registers-to-asm-asm.h.patch and

This is a note to let you know that I've just added the patch titled x86/asm: Add _ASM_ARG* constants for argument registers to <asm/asm.h> to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: x86-asm-add-_asm_arg-constants-for-argument-registers-to-asm-asm.h.patch and

This is a note to let you know that I've just added the patch titled x86/asm: Add _ASM_ARG* constants for argument registers to <asm/asm.h> to the 4.17-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: x86-asm-add-_asm_arg-constants-for-argument-registers-to-asm-asm.h.patch and

This is a note to let you know that I've just added the patch titled x86/asm: Add _ASM_ARG* constants for argument registers to <asm/asm.h> to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: x86-asm-add-_asm_arg-constants-for-argument-registers-to-asm-asm.h.patch and

Change the assembly code to use the new _ASM_MOVABS macro which get a symbol reference while being PIE compatible. Adapt the relocation tool to ignore 32-bit Xen code. Position Independent Executable (PIE) support will allow to extended the KASLR randomization range below the -2G memory limit. Signed-off-by: Thomas Garnier <thgarnie at google.com> --- arch/x86/tools/relocs.c | 16

On 06/05/18 10:05, Nick Desaulniers wrote: > + > +/* > + * void native_restore_fl(unsigned long flags) > + * %rdi: flags > + */ > +ENTRY(native_restore_fl) > + push %_ASM_DI > + popf > + ret > +ENDPROC(native_restore_fl) > +EXPORT_SYMBOL(native_restore_fl) > To work on i386, this would have to be %_ASM_AX in that case. Something like this added to

On 06/05/18 10:05, Nick Desaulniers wrote: > + > +/* > + * void native_restore_fl(unsigned long flags) > + * %rdi: flags > + */ > +ENTRY(native_restore_fl) > + push %_ASM_DI > + popf > + ret > +ENDPROC(native_restore_fl) > +EXPORT_SYMBOL(native_restore_fl) > To work on i386, this would have to be %_ASM_AX in that case. Something like this added to

4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nick Desaulniers <ndesaulniers at google.com> commit d0a8d9378d16eb3c69bd8e6d23779fbdbee3a8c7 upstream. native_save_fl() is marked static inline, but by using it as a function pointer in arch/x86/kernel/paravirt.c, it MUST be outlined. paravirt's use of native_save_fl() also

On Fri, Nov 02, 2018 at 10:10:45AM -0700, Linus Torvalds wrote: > On Fri, Nov 2, 2018 at 9:59 AM Michael S. Tsirkin <mst at redhat.com> wrote: > > > > Just for completeness I'd like to point out for vhost the copies are > > done from the kernel thread. So yes we can switch to copy_to/from_user > > but for e.g. 32-bit userspace running on top of a 64 bit kernel

On Fri, Nov 02, 2018 at 10:10:45AM -0700, Linus Torvalds wrote: > On Fri, Nov 2, 2018 at 9:59 AM Michael S. Tsirkin <mst at redhat.com> wrote: > > > > Just for completeness I'd like to point out for vhost the copies are > > done from the kernel thread. So yes we can switch to copy_to/from_user > > but for e.g. 32-bit userspace running on top of a 64 bit kernel

On 06/07/18 11:32, Nick Desaulniers wrote: > > Suggested-by: Sedat Dilek <sedat.dilek at gmail.com> If this was suggested by Sedat, I didn't see that suggestion... -hpa

On 06/13/18 14:05, Nick Desaulniers wrote: > From: "H. Peter Anvin" <hpa at linux.intel.com> > > i386 and x86-64 uses different registers for arguments; make them > available so we don't have to #ifdef in the actual code. > > Native size and specified size (q, l, w, b) versions are provided. > > Suggested-by: Sedat Dilek <sedat.dilek at

On 06/14/18 13:59, Nick Desaulniers wrote: > On Thu, Jun 14, 2018 at 1:48 PM H. Peter Anvin <hpa at zytor.com> wrote: >> >> On 06/13/18 14:05, Nick Desaulniers wrote: >>> From: "H. Peter Anvin" <hpa at linux.intel.com> >>> >>> i386 and x86-64 uses different registers for arguments; make them >>> available so we don't have

* Nick Desaulniers <ndesaulniers at google.com> wrote: > On Thu, Jun 14, 2018 at 5:17 PM H. Peter Anvin <hpa at zytor.com> wrote: > > > > On 06/14/18 13:59, Nick Desaulniers wrote: > > > On Thu, Jun 14, 2018 at 1:48 PM H. Peter Anvin <hpa at zytor.com> wrote: > > >> > > >> On 06/13/18 14:05, Nick Desaulniers wrote: > >

This is a note to let you know that I've just added the patch titled x86/paravirt: Make native_save_fl() extern inline to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: x86-paravirt-make-native_save_fl-extern-inline.patch and it can be found in the queue-4.14 subdirectory.

4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nick Desaulniers <ndesaulniers at google.com> commit d03db2bc26f0e4a6849ad649a09c9c73fccdc656 upstream. Functions marked extern inline do not emit an externally visible function when the gnu89 C standard is used. Some KBUILD Makefiles overwrite KBUILD_CFLAGS. This is an issue for GCC

This is a note to let you know that I've just added the patch titled compiler-gcc.h: Add __attribute__((gnu_inline)) to all inline declarations to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: compiler-gcc.h-add-__attribute__-gnu_inline-to-all-inline-declarations.patch